SignPSBTInput

Signs a PSBTInput, verifying that all provided data matches what is being signed.

Synopsis

Declared in <psbt.h>

[[nodiscard]]
util::Expected<void, common::PSBTError>
SignPSBTInput(
    SigningProvider const& provider,
    PartiallySignedTransaction& psbt,
    int index,
    PrecomputedTransactionData const* txdata,
    common::PSBTFillOptions const& options,
    SignatureData* out_sigdata = nullptr);

Description

txdata should be the output of PrecomputePSBTData (which can be shared across multiple SignPSBTInput calls). If it is nullptr, a dummy signature will be created.

Return Value

Success, or a PSBTError describing why signing failed.

Note	The return value should not be discarded.

Parameters

Name

Description

provider

The source of keys and scripts used to sign.

psbt

The PSBT containing the input.

index

The index of the input to sign.

txdata

Precomputed transaction data, or nullptr for a dummy signature.

options

Options controlling how fields are filled.

out_sigdata

Optional output receiving the resulting signature data.

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